
/* Copyright (c) 2009, Maxim Makhinya
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions are met:
 *
 * - Redistributions of source code must retain the above copyright notice, this
 *   list of conditions and the following disclaimer.
 * - Redistributions in binary form must reproduce the above copyright notice,
 *   this list of conditions and the following disclaimer in the documentation
 *   and/or other materials provided with the distribution.
 * - Neither the name of Eyescale Software GmbH nor the names of its
 *   contributors may be used to endorse or promote products derived from this
 *   software without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
 * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE
 * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
 * POSSIBILITY OF SUCH DAMAGE.
 */

#ifndef EQ_PLY_CAMERAANIMATION_H
#define EQ_PLY_CAMERAANIMATION_H

#include "eqPly.h"

namespace eqPly
{
/**
 * Loads sequence of camera positions and interpolates them on a per-frame
 * basis.
 */
class CameraAnimation
{
public:
    struct Step;

    CameraAnimation()
        : _curStep(0)
        , _curFrame(0)
    {
    }

    bool loadAnimation(const std::string& fileName);

    bool isValid() const { return !_steps.empty(); }
    Step getNextStep();

    uint32_t getCurrentFrame() { return _curFrame; }
    const eq::Vector3f& getModelRotation() const { return _modelRotation; }
    struct Step
    {
        Step()
            : frame(0)
            , position(eq::Vector3f(.0f, .0f, -1.0f))
            , rotation(eq::Vector3f(.0f, .0f, .0f))
        {
        }

        Step(int frame_, const eq::Vector3f& position_,
             const eq::Vector3f& rotation_)
            : frame(frame_)
            , position(position_)
            , rotation(rotation_)
        {
        }

        int frame;
        eq::Vector3f position;
        eq::Vector3f rotation;
    };

private:
    eq::Vector3f _modelRotation;
    std::vector<Step> _steps;
    uint32_t _curStep;
    int32_t _curFrame;
};
}

#endif // EQ_PLY_CAMERAANIMATION_H
